Xu Qianghua has been using this item to create fake versions of himself and integrate into various circles to gather information about the families.
In addition, he joins these families to find out if anyone is looking to fight him. Due to the families being low-key, many would try to find allies to share the burden.
And yes, he could send in the Shadow soldiers to infiltrate, but he knows that most conversations often happen secretly, involving only their closest members.
However, for the Shadow members, it will take a few more years before they can reach the inner circle. This is where he comes in; his disguise can work wonders and serve as a silent knife when necessary.
With this method, he can attend all the future meetings that are likely to be important, as the top family heads will be leading figures shaping this part of the world.